Two-pole snap-switch.



L. KELLNEVR. TWO POLE SNAP SWITCH.

APPLICATION FILED NOV. 17. 1908.

Patented Dec. 21, 1909.

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` after set forth and claimed.

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LOUIS KELLNER, OF NEWv YORK, N. Y., SSIGNOR TO METROPOLITAN SVITCHBOARI) CO., A CORPORATION' OF NEW JERSEY.

TWO-POLE SNAP-SWITCH.

Specification of Letters Patent.

Patented Dec. 21, 1905).

Application filed November 17, 1908. Serial No. 463,037.

To all whom it may concern:

lie it known that I, LOUIS KELLNER, a citizen of the United States, residing at the city of New York, in the borough of Brooklyn and State of New York,'have invented certain new and useful Improvements 1n Two-Pole Snap-Switches,of which the following is a full, clear, and exact description.

My invention relates to wall switches, particularly that type which is embedded'ln the wall, so as to be substantially Hush with the surface thereof, and including a two button snap switch by which a. circuit. or plurality ot' circuits are controlled.

"lf he present invention relates particularly to a mechanism for operating the switch elements abruptly in `their circuit closing and circuit opening movements, and further insuring a 90 throw, so that the circuit 1S ruptured by the greatest possible sparking distance.4

The present switch is desi ed to be of greater compactness and simp icity than the constructions hitherto used, making use ot' the stems of the operating buttons as detents to temporarily resist movement of the switch elements, untli the operating spring has been tensioneth enough to cause an ab rupt.throw. In connection with the dogs on the stems of the operating buttons, I provide a detent arm ixed to the switch elements and which is bent around so as to be engaged by. the operating spring. The operating spring is tensioned by a rocker arm having link connections with the operating buttons.

With the foregoing and other objects in view, my invention consists of the features of construction and Acombination as herein- In the drawings: Figure l is a side elevation of a .switch embodying the principles' of my invention. Fig. 2 is a vertical sectional view of the same. Fig. 3 is a section en the line IIIMIII of Fig. 2. Figs. 4, 5 and 6 are respectively detail perspective views of diiercnt parts-employed. Fi 7 is a detail view showing a modification.

Referring to thedrawings in which like parts are designated by the same reference sign, l designates a base which may be stamped ot' sheet metal, and carries a frame or standard 2, which supports the operating mechanism of the switch. The standard 2 is made in the form of a central vertical plate, to which is rigidly fixed a stud l axially perforated to form a journal or bearing for the spindle 5, which carries the switch elements.` The switch blades 01 elements may be fixed to the spindle 5 in any desired way. I prefer to make use of a U shaped bail or. frame (5, havingenlarged extrennties 7 in which the spin e is received and which are riveted to the switch blades 8. Screws or rivets J with insulating bushings and washers l0 may be used for connecting the switch blades to the enlarged extremities of the bail (3. 'lhe switch blades are mounted at about. a 45 angle with the radial plane of the bail t5, so that they swing from a horizontal to a vertical position when the bail is impellcd between its two 45 positions, will be later described. I conveniently construct'. the bail in two parts, one of which, (designated ll in the drawings), is L shaped and has a reduced extremity l2; the other part 13 is a straight arm and is perforated at its outer end to receive the reduced extremity ot' the arm ll, which is peened or riveted over therein so as to make a substantially unitary structnre.- The bail also has arigid downwardly extending detent arm It whichis forked or bifurcated at its lower extremity into two divisions or ears l5, which are bent at right angles therefrom and which extend in planes convergent toward cach other at an angle of about 45 with a central radial plane of the arm.

Adjacent to the standard 2 and pivoted on the stud 4 I provide a rocker Iplate 10 having two laterally extending arms 17, which are provided with pivot connections, later described. The plate also has a bent over L shaped arm 18.

2O designates a sleeve or collar 'loosely surrounding the stud at and serving as a distance piece to hold the .plate 1G firmly against the face of the standard 2, the otherl end of the collar abutting against the bail the arms 11 and 18 of the rocker plate and' the bail respectively. The spring tension is such that the extremities of the spring are 4 impelled toward one another and tend to constrainl the arms 11 and 18 which they embrace into the same radial plane of the s indle. If, for example, the arm' 18 is deected from any position, the bail tends to "follow in such movement. The movement of the bail carrying the switch blades is limited to a 90 throw by a curved slot 23 in the standard 2, through which the bail extends.

Any suitable means may be provided for displacing the rocker plate 16 through its required angular movement of `about 90. I prefer a pair. of push buttons 24 loosely received in holes 25 of the base 1, and which have stems 26 with slots 27, Vin which are received corresponding bent over ears 28 of the standard 2. AAt its extremity each stem 26 has'a link 29 pivoted thereto which extends inward and is pivoted to the arm 17 of the rocker plate at the point 30. It is evident 'thatthe rocker plate may be displaced to its alternate position. of throw b ushing inward one or another of the pus Each of the stems 26 of the push buttons has a dog 32 formed by merely bending inward a portion of the edge of the stem, and this do is in a path to intercept the movement of the detent ears 15 under certain circumstances. The length or longitudinal ex tent of'each dog 32 is madejust suflicient to receive an ear 1 5 past its outer end when the button is at its innermost positionpand permit the passage of the ear past the other or inner end of the dog when the button is at its outermost limit of throw.

The use in operation is as follows: Assuming the parts to be in the positions shown in Fig. 1 it is evident that inward ressure on the left-handl button will de ect the rocker plate 6 and tension the spring 22 so as to impel the bail 6 and switch elements totheir alternatepositions. From the very beginnin of the movement of the push button, and Iiefore the rocker plate'hashad any opportunity to tension the spring and move the switch elements, the right-hand dog 32 has been passed behind the ear 15 ofthe detent arm so that the switch elements are pre- 'vented from moving, notwithstanding the tension of the spring. This condition continues until the push button has been -depressed to practically its limit of movement elements is free to swing to its alternate position of throw,'as impelled by the spring.

Inasmuch as the other button is now at its outermostposition of throw, the other dog 32 is out of the path of its ear 15, which therefore swings in behind said dog to a position ready forthe next actuation. The button returnsr somewhat when pressure thereon is released, due to the spring 22, locking' the ear 15 behind dog 32.

By the foregoing process, `the switch elements' have assumed their alternate position of throw, which may correspond to v90" of angular movement. The result is a very abrupt make and break of the circuit, and by a throw of the maximum possible distance. v

Itwill be observed that the mechanism isv -the strength of the connection of any part to the operating spindle, which is notadapted to be made securely and should -not be relied upon to transmit the operating strains of the mechanism.

In Fig. 7 along detent arm 14 is employed on part 't'.r andl having ears 15 which both swing past the dogs 32 and are deiiect-I ed to properly cooperate therewith. This is an obvious mechanical equivalent of the structure first described.' This single detent arm serves all the functions of the two separate ears 15 of my irst described construction. The detent arm 14'.. is'mad'e rather long so that its lower` extremity swings far enough to pass the dogs 32 on both sides. The ears 15 are retained by their contact with the dogs after they have` been moved past the same.

What I claim is: f

1. In a switch of the class4 described, a standard having ears 28, push buttons having slotted stems engaging said ears, switch mechanism having a rocker-plate, and link connections from 'said push buttons to said rocker plate. 2 2. In a switch of the class described, a standardl havingears 28, push. buttons having slotted stems engaging said ears, switch mechanism having a rocker plate, link con-l nections from said push buttons to said switch elements, whereby' they move abruptly to t-heii` alternate positions of throw :xt each actuation. I

23. In a switch of the class described, a T- shaped standard having ears 28 'at its outer extremities and having an intermediate curved slot, push buttons having slotted Steins engaging said ears` switch mechanism having a rocker plate with an arm entering the curved slot of said standard, :1nd link 10 connections from said push buttons to said rocker plate.

In witness whereof, I subscribe my signalture, in the presence of two Witnesses.

LOUIS KELLNER. itnesses VVALDo M. CHAPiN, JAMES Dn AN'JONiO. 

